CN106939784A - The positioning acidizing device of stratified injection well - Google Patents
The positioning acidizing device of stratified injection well Download PDFInfo
- Publication number
- CN106939784A CN106939784A CN201710023461.4A CN201710023461A CN106939784A CN 106939784 A CN106939784 A CN 106939784A CN 201710023461 A CN201710023461 A CN 201710023461A CN 106939784 A CN106939784 A CN 106939784A
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- China
- Prior art keywords
- packing element
- injector
- acid filling
- injection well
- steel pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 57
- 239000007924 injection Substances 0.000 title claims abstract description 57
- 239000002253 acid Substances 0.000 claims abstract description 92
- 238000012856 packing Methods 0.000 claims abstract description 73
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 239000000243 solution Substances 0.000 claims abstract description 29
- 230000033228 biological regulation Effects 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 11
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 5
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 2
- 238000010306 acid treatment Methods 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses the acid filling steel pipe of a kind of positioning acidizing device of stratified injection well, including segmented, acid filling steel pipe is connected with being pumped into the high-pressure plunger pump conduit of high pressure acid solution；It is connected to interior packer between acid filling steel pipe between acid filling steel pipe in upper oil pipe, in lower oil pipe, has in interior packer inflatable and by upper oil pipe, the packing element of lower oil pipe bore seal；The check valve for being provided with level pressure injector, level pressure injector and acid filling steel pipe inner high voltage acid solution being injected to oil reservoir to be acidified by level pressure injection well downhole flow regulator is connected between acid filling steel pipe in level pressure injection well downhole flow regulator.The present invention keeps the working condition of each separate injection interval injection well downhole flow regulator of full well constant in separate layer acid treatment, high pressure acid solution is not with wellhead tree tree, down-hole oil tube and being acidified interval downhole tool and contacting, high pressure acid solution is efficiently solved to wellhead tree tree and the corrosiveness of full well oil pipe, reduce the consumption of high pressure acid solution, influence of the reduction acidizing treatment to environment.
Description
Technical field
The present invention relates to field of petroleum exploitation, especially a kind of positioning acidizing device of oil field layered injection well.
Background technology
Current Acidizing Technology is the main augmented injection means of oil field injection well, and for entering to be layered the well of injection string down,
If to carry out acidification to a certain interval, the injection well downhole flow regulator of other intervals must just be closed in advance, have ensured that high pressure acid solution
Pre-acidified interval can be smoothly entered, the method for use is to inject high pressure acid solution in down-hole oil tube using high-pressure pump in well head,
And fill up full well oil pipe and get to pre-acidified interval, certain journey can be produced to wellhead tree tree, full well oil pipe and downhole tool
The corrosiveness of degree, the workload for simultaneously closing off and reopening other interval injection well downhole flow regulators is also than larger.
The content of the invention
The technical problem to be solved in the present invention is：Overcoming deficiency in the prior art, there is provided keep full well during one kind acidifying
The working condition of each separate injection interval injection well downhole flow regulator is constant, and high pressure acid solution is not with wellhead tree tree, down-hole oil tube and being acidified interval well
The positioning acidizing device of the stratified injection well of lower tool contact.
The technical solution adopted for the present invention to solve the technical problems is：A kind of positioning acidizing device of stratified injection well,
Transferred by well head to layering injection string, the layering injection string includes upper oil pipe and lower oil pipe, described upper oil pipe with
It is connected with upper packer, level pressure injection well downhole flow regulator and lower packet between lower oil pipe in turn, described level pressure injection well downhole flow regulator correspondence is waited to be acidified
Oil reservoir position is set, and the acid filling steel pipe provided with segmented is run through between upper oil pipe and lower oil pipe, acid filling steel pipe is with being pumped into high pressure acid
The high-pressure plunger pump conduit connection of liquid；Between acid filling steel pipe between acid filling steel pipe in upper oil pipe, in lower oil pipe respectively
Interior packer is connected with, described interior packer, which to be had, outwards expanded after compression and seal upper oil pipe, the packing element of lower oil pipe inner chamber；
Level pressure injector is connected between acid filling steel pipe in level pressure injection well downhole flow regulator, level pressure injector has acid filling steel pipe inner high voltage
Acid solution injects the check valve of oil reservoir to be acidified by level pressure injection well downhole flow regulator.
Further, acid filling steel pipe bottom is threaded with guiding plug.
Interior packer upper and lower ends are fixed by box cupling with acid filling steel pipe respectively, and described interior packer includes being fixed on glue
Take over and be symmetrically arranged at centered on packing element in packing element in cylinder and taken in the packing element component of both sides above and below packing element, packing element
The expansion that high pressure acid solution is depressed into packing element inwall is respectively symmetrically provided with acid filling steel pipe pipeline connection and upper corresponding packing element upper and lower side
Hole.
Further, for the ease of packing element expansion plugging, packing element component includes packing element joint and packing element central tube, and packing element connects
Headgear is located at outside box cupling, and packing element central tube is arranged in packing element joint and packing element between adapter, described packing element upper and lower ends point
It is not outer to be extended down in packing element joint and packing element between adapter and be connected with the molding of packing element central tube.
Further, packing element joint is threadedly coupled with box cupling, between described box cupling and glue bucket joint, in box cupling and packing element
Sealing is provided with O-ring between adapter, can effectively improve the sealing property between each connector.
Level pressure injector includes top and simultaneously the injector top connection of insertion and bottom and acid filling is connected with acid filling steel tube screw thread
Steel tube screw thread connection and the injector lower contact of insertion, are threaded between the injector top connection and injector lower contact
Injector center tap, injector center tap has axial bore.Check valve is arranged in axial bore, including regulation plug.Axle
Inward hole lower end is fixed by O-ring with regulation plug sealing, and the acid filling hole is opened in injector center tap length direction
Point place, the connection of acid filling hole and with level pressure injection well downhole flow regulator insertion, be fixed with spring on regulation plug, spring top be then connected with the top of nothing
Axial bore below the steel ball for the axial bore blocked during downward pressure by spring jacking above acid filling hole, the acid filling hole is straight
Footpath is more than steel ball size, and the axial bore diameter above acid filling hole is less than steel ball size, described regulation plug, spring, steel ball
Match somebody with somebody with axial bore and be combined into check valve.
Further, in order to effectively improve the sealing inside level pressure injector between each joint, injector top connection
Sealing is provided with O type circles respectively between injector center tap, between injector lower contact and injector center tap.
The beneficial effects of the invention are as follows：The positioning acidizing device for the stratified injection well that the present invention is provided, keeps full during acidifying
The working condition of each separate injection interval injection well downhole flow regulator of well is constant, and high pressure acid solution is not with wellhead tree tree, down-hole oil tube and being acidified interval
Downhole tool is contacted.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Figure Fig. 1 is the structural representation before present invention injection high pressure acid solution.
Fig. 2 is the structural representation after present invention injection high pressure acid solution.
Fig. 3 is the axial sectional view of packer in the present invention.
Fig. 4 is the axial sectional view of level pressure injector of the present invention.
The acid filling steel of 2. upper packer of oil pipe, 3. level pressure injection well downhole flow regulator, 4. lower packet 5. under oil pipe 1-2. on 1-1. in figure
Adapter 6-5. inflation ports in packer 6-1. packing elements 6-2. packing elements joint 6-3. packing element central tube 6-4. packing elements in pipe 6.
7. level pressure injector 7-1. top connection 7-2. lower contact 7-3. center tap 7-4. axial bores 7-5. regulation plugs 7-6.
Acid filling hole 7-7. spring 7-8. steel balls 8. are oriented to the oil reservoir to be acidified of 9. box cupling 10.O types circle of plug 11.
Embodiment
Presently in connection with accompanying drawing and preferred embodiment, the present invention is further illustrated.These accompanying drawings are simplified signal
Figure, only illustrates the basic structure of the present invention in a schematic way, therefore it only shows the composition relevant with the present invention.
A kind of positioning acidizing device of stratified injection well as shown in Figures 1 to 4, is transferred to layering injection string by well head
It is interior, it is described layering injection string include upper oil pipe 1-1 and lower oil pipe 1-2, between described upper oil pipe 1-1 and lower oil pipe 1-2 according to
It is secondary to be connected with upper packer 2, level pressure injection well downhole flow regulator 3 and lower packet 4, the described correspondence of level pressure injection well downhole flow regulator 3 11, oil reservoir to be acidified
Install.
Run through the acid filling steel pipe 5 provided with segmented, the bottom spiral shell of acid filling steel pipe 5 between upper oil pipe 1-1 and lower oil pipe 1-2
Line is connected with guiding plug 8.Acid filling steel pipe 5 is connected with being pumped into the high-pressure plunger pump conduit of high pressure acid solution；In upper oil pipe 1-1
Acid filling steel pipe 5 between, between the acid filling steel pipe 5 in lower oil pipe 1-2 be connected to interior packer 6, described interior packer 6
Upper oil pipe 1-1, the packing element 6-1 of lower oil pipe 1-2 inner chambers are sealed with outside expansion after compression.The interior upper and lower ends of packer 6 point
Do not fixed by box cupling 9 with acid filling steel pipe 5, described interior packer 6 includes being fixed on adapter 6-4 in the packing element in packing element 6-1
With the packing element component that above and below packing element 6-1 both sides are symmetrically arranged at centered on packing element 6-1, adapter 6-4 and acid filling in packing element
The pipeline connection of steel pipe 5 and it is upper correspondence packing element 6-1 upper and lower sides be respectively symmetrically provided with the expansion that high pressure acid solution is depressed into packing element 6-1 inwalls
Hole 6-5.
Further, for the ease of packing element 6-1 expansion pluggings, packing element component includes packing element joint 6-2 and packing element central tube
6-3, packing element joint 6-2 is set in outside box cupling 9, packing element central tube 6-3 be arranged in packing element joint 6-2 and packing element adapter 6-4 it
Between, described packing element 6-1 upper and lower ends respectively it is outer be extended down in packing element joint 6-2 and packing element between adapter 6-4 and with packing element center
Pipe 6-3 molding connections.Packing element joint 6-2 is threadedly coupled with box cupling 9, between described box cupling 9 and glue bucket joint, box cupling 9 and glue
Sealing is provided with O-ring 10 between adapter 6-4 in cylinder, can effectively improve the sealing property between each connector.
It is connected with level pressure injector 7, level pressure injector 7 and is additionally provided with for acid between acid filling steel pipe 5 in level pressure injection well downhole flow regulator 3
Liquid is by connecting the passage of the two ends acid filling steel pipe 5 of level pressure injector 7.Also have the inner high voltage of acid filling steel pipe 5 in level pressure injector 7
Acid solution injects the check valve of oil reservoir 11 to be acidified by level pressure injection well downhole flow regulator 3.
Level pressure injector 7 includes top and simultaneously the injector top connection 7-1 of insertion and bottom is threadedly coupled with acid filling steel pipe 5
Simultaneously injector the lower contact 7-2, the injector top connection 7-1 of insertion and injector lower contact are threadedly coupled with acid filling steel pipe 5
Injector center tap 7-3 is threaded between 7-2, injector center tap 7-3 has axial bore 7-4, and check valve is arranged on
In axial bore 7-4, including regulation plug 7-5, axial bore 7-4 lower ends seal solid by O-ring 10 with regulation plug 7-5
It is fixed.The acid filling hole 7-6 is opened in injector center tap 7-3 length direction midpoints, the 7-6 connections of acid filling hole and with level pressure water distribution
Spring 7-7 is fixed with the insertion of device 3, regulation plug 7-5, by spring when spring 7-7 tops are then connected with top without downward pressure
Axial bore 7- below the axial bore 7-4 that 7-7 jackings are blocked above the 7-6 of acid filling hole steel ball 7-8, the acid filling hole 7-6
4 with diameter greater than steel ball 7-8 diameters, and the axial bore 7-4 diameters above the 7-6 of acid filling hole are less than steel ball 7-8 diameters.Adjust plug
7-5, spring 7-7, steel ball 7-8 and axial bore 7-4, which match somebody with somebody, is combined into one-way valve structures.In order to effectively improve in level pressure injector 7
Sealing between each joint of portion, between injector top connection 7-1 and injector center tap 7-3, injector lower contact 7-2 with
Sealing is provided with O-ring 10 respectively between injector center tap 7-3.
When positioning acidifying, by, to being layered in injection string, it is fixed to make below the positioning acidizing device of above-mentioned stratified injection well
Press injector 7 corresponding with the position of level pressure injection well downhole flow regulator 3 for being arranged on the underground position of oil reservoir 11 to be acidified.Then pass through high-pressure plunger pump
High pressure acid solution is pumped into acid filling steel pipe 5.
High pressure acid solution flows through the interior packer 6 in oil pipe 1-1, and point for passing through the two ends pipeline connection of level pressure injector 7
The insertion pipeline of segmentation steel pipe continues towards the interior packer 6 in lower oil pipe 1-2.When in upper oil pipe 1-1 and lower oil pipe 1-2
When pressure (i.e. internal pressure) at interior packer 6 is more than pressure in its outside down-hole oil tube 1-2, high pressure acid solution passes through inflation port 6-5
Gradually pressurizeed to packing element 6-1 inwalls, packing element 6-1 outwards expansion until by upper oil pipe 1-1 and lower oil pipe 1-2 bore seals.Now
Continue to be pumped into high pressure acid solution into acid filling steel pipe 5, pressure increase of the acid filling steel pipe 5 at check valve steel ball 7-8, steel ball 7-8 quilts
Press to down, pipeline is turned at the 7-6 of acid filling hole, high pressure acid solution can be flowed out level pressure injector 7 by acid filling hole 7-6 and be squeezed into oiling
The sealing annular space that interior packer 6 in pipe 1-1 and lower oil pipe 1-2 is formed after expanding.Under pressure, high pressure acid solution is then
Entered by level pressure injection well downhole flow regulator 3 in oil reservoir 11 to be acidified, realize positioning acidifying purpose.
The positioning acidizing device for the stratified injection well being so designed that, by installing acid filling steel pipe 5, interior envelope additional in addition in oil pipe
Every device 6 and level pressure injector 7, high pressure acid solution is directly injected into oil pipe in well head during relative to tradition acidifying, high pressure acid solution is used
Amount is small, is conducive to environmental protection.Without the working condition of the complete each interval injection well downhole flow regulator of well of change during acidifying.Other each layers can injection well downhole flow regulator
Can normal work.High pressure acid solution is not contacted with wellhead tree tree, down-hole oil tube 1-2 and other interval downhole tools, reduces acidifying
The influence to it is operated, the service life of wellhead tree tree, down-hole oil tube 1-2 and other interval downhole tools is greatly prolonged, subtracts
Few oilfield exploitation cost.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and be carried out, and it is not intended to limit the scope of the present invention, all according to the present invention
The equivalent change or modification that Spirit Essence is made, should all cover within the scope of the present invention.
Claims (7)
1. a kind of positioning acidizing device of stratified injection well, will be positioned acidizing device and is transferred to layering and injected by well head conveying equipment
In tubing string, the layering injection string includes upper oil pipe (1-1) and lower oil pipe (1-2), described upper oil pipe (1-1) and lower oil pipe
It is connected with upper packer (2), level pressure injection well downhole flow regulator (3) and lower packet (4), described level pressure injection well downhole flow regulator (3) between (1-2) in turn
Correspondence oil reservoir (11) position to be acidified is set, it is characterized in that：Run through between upper oil pipe (1-1) and lower oil pipe (1-2) provided with segmentation
The acid filling steel pipe (5) of formula, acid filling steel pipe (5) is connected with being pumped into the high-pressure plunger pump conduit of high pressure acid solution；Positioned at upper oil pipe (1-1)
Interior packer (6) is connected between acid filling steel pipe (5) between interior acid filling steel pipe (5), in lower oil pipe (1-2), it is described
Interior packer (6) have be pressurized after outwards expansion and seal upper oil pipe (1-1), the packing element (6-1) of lower oil pipe (1-2) inner chamber；
Level pressure injector (7) is connected between acid filling steel pipe (5) in level pressure injection well downhole flow regulator (3), level pressure injector (7) has will note
Sour steel pipe (5) inner high voltage acid solution injects the check valve of oil reservoir to be acidified (11) by level pressure injection well downhole flow regulator (3).
2. the positioning acidizing device of stratified injection well according to claim 1, it is characterized in that：Described acid filling steel pipe (5)
Bottom is threaded with guiding plug (8).
3. the positioning acidizing device of stratified injection well according to claim 1, it is characterized in that：Described interior packer (6)
Upper and lower ends are fixed by box cupling (9) and acid filling steel pipe (5) respectively, and described interior packer (6) includes being fixed on packing element (6-1)
(6-4) is taken in interior packing element and the packing element of both sides above and below packing element (6-1) is symmetrically arranged at centered on packing element (6-1)
Take over (6-4) and acid filling steel pipe (5) pipeline connection in (6-1) component, packing element and upper corresponding packing element (6-1) upper and lower side respectively symmetrically
It is provided with the inflation port (6-5) that high pressure acid solution is depressed into packing element (6-1) inwall.
4. the positioning acidizing device of stratified injection well according to claim 3, it is characterized in that：Packing element (6-1) component
Including packing element joint (6-2) and packing element central tube (6-3), packing element joint (6-2) is set in box cupling (9) outside, packing element central tube (6-
3) it is arranged in packing element joint (6-2) and packing element and takes between (6-4), described packing element (6-1) upper and lower ends are outer respectively is extended down to
Packing element joint (6-2) in packing element with taking between (6-4) and being connected with packing element central tube (6-3) molding.
5. the positioning acidizing device of stratified injection well according to claim 4, it is characterized in that：Packing element joint (6-2) is with connecing
Bind round between (9) threaded connection, described box cupling (9) and glue bucket joint, take in box cupling (9) and packing element between (6-4) to seal and set
There is O-ring (10).
6. the positioning acidizing device of stratified injection well according to claim 1, it is characterized in that：Described level pressure injector
(7) include top to be threadedly coupled with acid filling steel pipe (5) and the injector top connection (7-1) of insertion and bottom and acid filling steel pipe (5)
Be threadedly coupled and insertion injector lower contact (7-2), the injector top connection (7-1) and injector lower contact (7-2) it
Between be threaded with injector center tap (7-3)；The acid filling hole (7-6) is opened in injector center tap (7-3) length direction
Midpoint, acid filling hole (7-6) connection and with level pressure injection well downhole flow regulator (3) insertion；Injector center tap (7-3) has axial bore (7-
4), check valve is arranged in axial bore (7-4), including regulation plug (7-5), and axial bore (7-4) lower end passes through O-ring
(10) fixed with regulation plug (7-5) sealing, be fixed with spring (7-7) on regulation plug (7-5), spring (7-7) top then connects
The steel ball for the axial bore (7-4) blocked when being connected to top without downward pressure by spring (7-7) jacking above acid filling hole (7-6)
Axial bore (7-4) below (7-8), the acid filling hole (7-6) is with diameter greater than steel ball (7-8) diameter, above acid filling hole (7-6)
Axial bore (7-4) diameter be less than steel ball (7-8) diameter.
7. the positioning acidizing device of stratified injection well according to claim 6, it is characterized in that：Described injector top connection
Sealed respectively between (7-1) and injector center tap (7-3), between injector lower contact (7-2) and injector center tap (7-3)
Provided with O-ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710023461.4A CN106939784A (en) | 2017-01-13 | 2017-01-13 | The positioning acidizing device of stratified injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710023461.4A CN106939784A (en) | 2017-01-13 | 2017-01-13 | The positioning acidizing device of stratified injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106939784A true CN106939784A (en) | 2017-07-11 |
Family
ID=59468632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710023461.4A Pending CN106939784A (en) | 2017-01-13 | 2017-01-13 | The positioning acidizing device of stratified injection well |
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| Country | Link |
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| CN (1) | CN106939784A (en) |
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Application publication date: 20170711 |